CLOUDSTACK-4908: UI for report CPU sockets

-Adds socket info for hypervisors on infrastructure chart

-Displays # of sockets, and # of hosts

-Currently only dummy data set to 0 for all info
Add new infrastructure UI styling; add CSS for socket info box
CLOUDSTACK-4967
1) vxlan will use bridge scheme 'brvx-<vni>'. Multiple physical networks can host guest
traffic type with vxlan isolation, so long as they don't use the same VNI range.

2) Guest traffic labels can be physical interface if bridge by given name is not found.
Normally we take traffic label name, find the matching bridge, then resolve that to a
physical interface. Then we create guest bridges on that interface. Now we can just
specify the interface.